摘要：试样在650℃烧制、王水溶解、泡塑振荡吸附、硫脲解脱，用电感耦合等离子体发射光谱法测定矿石中的金量，克服了原子吸收光谱法对低含量金测定稳定性和精密度差、对高含量金测定分取误差大和返工率高等不足，缩短了分析时间。方法经国家一级标准物质分析验证，结果与标准值相符。对二级标准物质测定的方法精密度（RSD，n=12）为6.45%。方法检出限为0.138 μg/g，线性范围宽，适用于矿石中0.2 μg/g 以上金的测定。

Determination of Gold in Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry with Plastic Foam Absorption

ABSTRACT Ore sample, pretreated at 650℃, was decomposed with aqua regia. Au in the sample solution was then preconcentrated by adsorbing with polyurethane foam plastic and released with thiourea solution and determined by inductively coupled plasma-atomic emission spectrometry. The detection limit of the method for Au was 0.138 μg/g. The method has been applied to determination of Au in National Standard Reference materials and the results are in agreement with certified values with precision of 6.45%RSD (n=12). The method provides the advantages of higher stability, higher accuracy and more efficiency compared with atomic absorption spectrometry (AAS).